Improvement in steam-engine valve-gear



dem sara aient omitir.

CHARLES L. INSLEE, OF NEW YORK, N. Y., AND WILLIAM HNSLEE. OF NEWARK,NEW JERSEY.

Letters Patent No. 94,316, dated August 31, 1869.

IMPROVEMENT IN .'STEAM-ENG-INE VALVE-GEAR.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

Be it known that we, CHARLES L. INSLEE, of New York, in the county ofNew York, and State of New York, and WILLIAM H. INsLEE, of Newark, inthe county of Essex, and State of N ewJ ersey, have invented a new andimproved Valve-Gear for Steam-Engines; and we do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

This invention relates to new and useful improvements in valves, ports,and operating-devices, whereby it is designed to provide a simple andcheap plan of construction, and a more eflcient arrangement of the samefor operation than any now in use.

The invention consists in an improved arrangement of steam-chestpassages and live-steam and exhaust balance-valves andoperating-devices, as 'hereinafter more fully specified.

Figure 1 represents a longitudinal sectional elevation through thevalve-ehest, and

Figure 2 represents a transverse section, taken on the line :t x.

Similar letters of reference indicate corresponding parts.

A represents the valve-chest, preferably located at theside of thecylinder. It is divided into tworhambers, B C.

D and E represent the ports,

F, the live-steam valve, and

G, the exhaustvalve.

The steam is admitted through the passage H, and exhausted at L Thesevalves are circular disk or piston-valves, and ttd to work snuglythrough cylindrical passages a, through the bars K, and into coincidentpassagesqb, in the end walls of the steam-chest. They are considerablyreduced between the ends fitting these passages or seats,'and the steampresses equally on the shoulders where they are reduced, whereby theyare always balanced.

When the valve F is movedthrough the bar K, at either end of the chest,toward the said end thereoi, the steam follows, and is admitted to theport, and where the valve Gr passes through the said bars in likemanner, the steam escapes into the chamber C and exhausts.

v For operating those valves, they are connected to cranks L M, of arock-shaft, N, the one above and the other below the centre of the saidshaft, which is worked by an eccentric on the crank-shaft andconnecting-rod, in the usual way.

The crank L is slot-ted, and the rod O of the livesteam valve isconnected to an adjustable block, P, capable of sliding up and down inthe slot, and provided with an adiusting-screw, Q. By this arrangement,the movement of the valve F may be made longer or shorter, as required,and the admission 'of steam regulated, without interfering with themovement of the exhaust, which may be always set for a full opening.

Instead of the adj listing-screw and sliding block P, any 'otherarrangement of devices may be used for adjusting the'rod 0.

We propose to connect the block P, in some cases` to the governor, andthus provide for regulating the admission of steam by this adjustment ofthe valve E.

As the pressure of steam upon these valves is always countcrbalanced inall the parts, they will not wear sensibly, andthe force required tomove them will be only that required yto overcome the friction.Moreover, they are not liable to be aected by unequal expansion orcontraction, as the steam is admitted to the spaces beh-ind t-he valves.

The construction is very simple and cheap, requiring but little litt-ingfor the valve; and seat-s, which may be done by turning the valves in alathe, and by bor- .ing the seats a b when the two parts of the chest,which may be divided on the section represented in the drawing, arejoined together.

Having thus described our invention,

XVe claim as new, and desire to secure by Letters Patent- 1. rlhearrangement of valves F G and valve-seats u b, with eferene to chambersB G and ports D E, as and for the purpose set forth.

2. -The construction and arrangement, with respect to each other,- otthe rod O, slide P, screw Q, and yoke L, for the purpose of adjustingthe throw ofthe valves F G, as set forth.

The above specification of our invention signed by us, the 1st and 3ddays of June, 1869.

WM. H. INSLEE. CHAS. L. INSLEE. Witnesses FRANK BLOCKLEY, ALEX. F.ROBERTS.

